A lot of used car dealers will change fluids prior to selling a vehicle, because people like you and me will pull the dipstick. It's hard to tell if the fluid was the wrong color because the dealership replaced the fluid with the wrong fluid thinking the vehicle had a CVT, or it could have been the previous owner who thought an oil salesman knew more than the engineers who designed the transmission and used some clear hydraulic oil instead of transmission fluid. Regardless of the reason, I'd steer clear (no pun intended.)